Electric switch.



No. 694,977; n Patented Mar. u, I902.

R. c. moons.

" ELECTRIC SWITCH.

Application filed Mar. 1, 1901. (No Model.) 3 Shaets--Sheat I.

awmmwm No."694,97 7. Patented Marfll, I902."

' R. C. MOORE.

ELECTRIC SWITCH.

Application filed Mar. 1, 1901. (No Model.) 3 Sheets-Sheet 2. 1

AMWWWMMWWM Q I I nvewr;

'Z. Ci/Zool.

m: scams PETERS co. v nomuwo, WASHKNDTON. I:v

No. 694.977. Patented Mar. u, I902.

arc. moons;

ELECTRIC SWITCH. q

(Application filed Mar. 1, 1901.

I (No Model.) 3 Sheets-Sheet 3.

R Cf l fa are.

UNiT-E FFHQEQ ROBERT C. MOORE, OF KANSAS CITY, MISSOURI.

ELECTRIC S'WlTCH.

, 'SEECIIFIQATION forming part of Letters Patent NO. 694,977, datedMarch 11, 1902. Application filed March 1, 1901. Serial No. 49,379. (Nomodel.)

To (tZZ whom it may concern."

Be it known that I, ROBERT C. MOORE, a citizen of the United States,residing at Kansas City, Jackson county, Missouri, have invented a newand useful Electric Switch, of which the following is a specification.

My invention relates to switch mechanisms for electric systems, andparticularly to that class which enable the operator in the centraloffice to establish in a party-line or analogous system a private wireconnection between the callinginstrument and theone with whichconnection is desired.

My object is to produce an efficient and reliable switch mechanism ofthe class described which is of comparatively simple, compact, andinexpensive construction and which can be easily installed as a part ofa new or as an improvement of an old system.

Before proceeding with the detailed description of the invention itiswell to state that while my improved switch mechanism may be used intelegraph and electric-light -or other electric-systems it is designed,primarily, for use in telephonic systems, particularly those embracing anumber of phones on the same line, known as party-linesystems. For thisreason when referring to the phone generally,particular1y in the claims,I use the term service instrument in order to avoid even the appearanceof an undue limitation of the invention, it being understood whenservice instrument is-referred to that it may be an electric light, aprivate telegraph apparatus, or a phone or any other instrument fromwhich the subscriber of that particular station receives some serviceand which isoperative electrically. For convenience the drawings andspecification show and refer to the apparatus only as used in connectionwitha telephonic system,and throughout said description the serviceinstrument is termed a phone and itsnumberis referred to as the phonenumber.

Essential elements in the production of an apparatus embodying theinvent-ion are enumerated below, the novelty of the invention dependingto some extent on peculiarity of combination and peculiarities ofconstruction of an apparatuscapable of sending from one to any desirednumber of electric pulsations over a circuit supplementary or auxiliaryto the main-line circuit: A rotary disl; for intermittent operationlocated at each subscribers station or instrument and inscribed in acircle with numbers corresponding with the number of phones on the lineand with two cam-notches in its periphery, one notch be ing located inradial alinement with the number indicative of its respective phonesuch,for instance, as the number 6 of phone number 6," (see Fig 2,) and theother or home notch at a distance from the firstnamed notchcorresponding to the number of steps which the disk must take to reachthe notch opposite the phone numberthat is to say, in phone nu mber 6the home notch is located diametrically opposite the phone-number notch,while the notches of. phone number 11 will be eleven steps apart, thoughappearing side by side, forithe reason that the disk always rotates inthe direction indicated by the arrow, Fig. 2; a vibratory contactoperated by the disk to make and brealc the main-line circuit throughthe phone, said con.- tact being insulated from the disk; anelectromagnet located in .the supplementary or auxiliary circuit or inthe local circuit of the instrument" and through which the course of thecurrent is controlledby the central operator; a magnet-carrying lever tovibrate under the pulsations of current passing through the'magnet;means for imparting to the disk an intermittent action through themedium ofthe magnet-carrying lever, andmeans for securing the diskagainst back rotation.

The normal condition of all theinstruments is such that the home notchesare all vertically, above the axes of the disks, with the vibratorycontacts consequently depressed and in circuit with their respectivephones. Assuming now that a subscriber wishes to talk with thesubscriber of phone number 6, he so notifies central in the usual 01'any preferred manner of that fact; but as his phone is already incircuit it should not be disturbed. The invention therefore consists,further, in means whereby the calling subscriber is enabled to hold hisphone inactive as central sends the pulsations over the line, the elfectof which is to synchronously rotate the disks of all the instrumentsexcept that of the calling subscriber. These pulsa tions, by reason ofthe registration of the ments said subscriber could again hold hisdisk-notch indicative of phone number 6 with its respective vibratorycontact, result in the depression of the latter and the establishment ofthe main-line circuit through the corresponding phone, (see Fig. 2,) allof the remaining phones, except, of course, that of the callingsubscriber, which has remained inactive, and therefore in the main-linecircuit, being thrown out of circuit by the engagement of theirrespective vibratory contacts with the conductors of the main lineinterposed between their respective phones and the source of electricenergy, this non-registration of their vibratory contacts with theircorresponding disk-notches resulting from the fact that said notches areeither a fewer or greater number of steps from their home notches thanis the notch of number 6. When the conversation is ended, central isnotified of that fact in the usual or any preferred manner andimpartsthe necessary pulsations over the line to restore the phones totheir original condition or the home notches, and all, therefore, incircuit with the main line. As the calling subscribers phone, however,had remained inactive during the first series of steps of the disks ofthe remaining instrudisk inactive until the other instruments wererestored to their original condition, when all would again be ready foroperation. If the calling subscriber failed to hold his instrumentduring the steps necessary to restore the other instruments to theirnormal condition, it is clear that the disk of the calling subscribersinstrument would be rotated an insufficient distance and would thereforebe outof circuit with the remaining instruments, because of thenon-registration with its vibratory contact of the notch indicative ofits number, of which fact central would be ignorant, and, whetherignorant or not, powerless to correct. The invention therefore furtherconsists in means whereby the calling subscriber whose disk is exposedto observation may mechanicallyimpart the additional steps to restorehis instrument to its original or normal condition, when. the en tireline would .be'intact and in proper working order.

The invention furthermore consists in means'fo'r preventing children orother unauthorized persons from tampering with the phone and'eitheraccidentally or maliciously throwing the same out ofcircuit, andtherefore in. such condition that the mistake must berectified locallybefore said phone can be used. 7

With the general objects in view above mentioned the invention alsoconsists in certain novel and peculiar features of construction andcombinations of parts, as hereinafter described and claimed, and inorder that it maybe fully understood reference is to be had to theaccompanying drawings, in, which-- Figure 1 represents a diagrammaticview of an electric system embodying my invention, the switch-circuitbeing reinforced at each subscribers station by a battery. Fig. 2represents an enlarged diagrammatic view of part of said system andshows circuits local to each instrument and provided-with relaysactuated by the switch-circuit. Fig. 3 is a face view of a casing withits door open, this casing containing the switch mechanism andreinforcing-battery of the switch-circuit, certain conductors of themain-line circuit also being located in the casing. Fig. 4 is a verticalsection taken on the dotted line IV of Fig. Fig. 5 is an enlargedhorizontal section taken on the line V V of Fig. 6; Fig. 6 is a verticalsection, on the same scale as Fig. 5, taken on the dotted line VI ofFig. 5. Fig. 7 is a sectional view showing the mechanism for impartingforward motion to and preventing back rotation of the disk hereinafterdescribed. Fig. 8 is a detail perspective view showing more clearly therelation between the armature-carryin g lever and the push-rodangle-arm, whereby the operation of the armature-carrying lever can beprevented, irre= spective of whether the magnet is energized or not.

Similar reference-nu merals designate corresponding parts in all'thefigures.

l designates the main line of an electric system, which receives itselectric energy from 'a'dynamo or electric battery, as shown at 2,

the phone 3 being interposed between a contact 4 and the battery, andacontact 5, preferably adjacent to contact 4, being interposed betweenthe phone and the battery, these contacts being preferably locatedwithin a casing 6, forming a part of the phone-casing or securedadjacent thereto. I v V The phone comprises the transmitter A, thesignalmechanisinoperating crank B, the hooked switch-lever C, and thereceiver or hand phone D, communication being established with centralby handling the operating-crank in the usual manner, this manipulationcausing the annunciator E to notify central that the calling subscriberwishes to talk to central and obtain connection with some othersubscriber. The operating-crank B, hooked switch-lever C, receiver orhandphone D, and annunciator E appear only in Fig. 2, as they can beshown more clearly in said figure than in Fig. 1, as the latter is drawnto a considerably smaller scale.

7 designates a vibratory contact, the same being arranged to contactwith contact 4 or with contact 5 in the latter case, of course,shnnting'the corresponding phone out of circuit, as will be readilyunderstood by reference to Fig. 2, and attached to but insulated fromthis vibratory contact is a tooth 8, ar-

IIO

ranged to ride upon the periphery of disk 9 of its respectiveinstrument,which disk is provided with a circular series of characters,

with a notch 11. The tooth 8 of the vibratory contact rests in the homenotch 10 when the instrument is in condition to be used or to be calledinto use,and when acting as the called instrument said tooth engages thenotch 11 indicative of the phone number. The shaft ofdisk 9 is journaledin a suitable frame, as at 12, secured upon a shelf in casing 6, andrigidly secured to and at opposite sides of the disk are theratchet-wheels 13 and 14, having their teeth disposed inoppositedirections, a pivoted catch 1.5, mounted on the frame,.serving tosuccessively engage the teeth of wheel 14, and thus prevent backrotation of the disk. The ratchet-wheels are shown as provided withdouble the number of teeth as there are characters on the disk in orderthat it shall require two pulsations of current, as hereinafter appears,to move the disk one step, or one-twelfth in this instance of arevolution; but it is to be understood that the nu'mberof teeth of theratchet-wheels may correspond with the characters on the disk or mayequal any' other multipleof said characters than that shown. To impartmovement to the disk, and to positively and reliably limit suchmovement, I provide a lever 16, carrying a pivoted spring-actuated pawl17 engaging ratchet-wheel 14, and provided with a tooth 18 to engageratchet-wheel 13, and positively limit each disk movement to exactly onestep, a retractile spring 19 being employedto normally hold the leverwithits tooth 18 out of engagement with ratchet-wheel13, and its pawl 17in position to impart movement to the disk as the lever rises, astop 20projecting from the frame serving to positively limit themovementimparted to the lever by said retractile spring. Secured to the oppositeend of the lever is an armature 2'1for an ele'c tromagnet 22, supportedin any suitable man ner within the casing and frame, (see Fig. 3,) saidmagnet being located in an electric circuit 23,.local to the instrument,min a cir-.

cuit supplemental or auxiliary to and practically paralleling themain-line circuit, as hereinafter explained. The local circuit 23, asshown in Fig. 2, includes a battery, con

sisting of a plurality of cells 24, arranged within the casing 6,preferably, and below the shelf on which frame 12 rests. cludes arelay25 of the usual or any preferred construction, said relay beinglocated in the supplemental or auxiliary circuit herei nbeforereferredto, which circuit is herein designated by number 26, the source ofelectric energyfor said circuit being a dynamo or a battery, as shown at27, inthe central office.

This source of electric energy is preferably a battery, because wherecircuits local to the instrument are employed the current need only besufficiently strong to operate the relays, which in the usual mannercomplete said local circuits and energize their magnets. Incase,however, circuits local to the instrument are not established and thebatteries 24 are located in and simply used to reinforce It also informdescribed and illustrated in Fig. 2 is i that which is preferred andwhich, it is believed, will prove the most economical and satisfactory.Fig. 1 shows the system as,arranged with the batteries 24 located in andreinforcing the current passing through circuit 26.

To energize the magnets the proper number of times, andtherefore effectthe desired adjustment 'of the disks, central may employ any suitabledevice or devices to make and break the circuit 26, and therefore sendthe necessary pulsations over the line; but in order" to requireaslittle attention from central as possible and to make the apparatuspractically automatic I provide a switchboard 28, embracing a shaft 29,and an arm 30 upon said shaft and adapted to rotate in the directionindicated by the arrow, Fig. 2, under any suitable power, such as aclockwork, (not shown,) when not arrested by an obstruction in its path,such asa plug, hereinafter referred,'to or the pivoted catch 3l,said

catch being heldnormally in the path'of the arm bymeans' of a spring 32,suitably secured to the switchboard. This catch occupies a position onthe switchboardcorresponding to the home notch of the disks, theswitchboard being provided with a circular series ef holes 33, marked tocorrespond with the numbers on the disks indicative of the phonenumbers, a suitable plug 34, hereinbefore mentioned, being adapted to beinserted by central in the hole opposite the character corresponding tothe called 'phone that is to say,"assuming that phone number 6 has beencalled 'central instantly places the plug in hole 6 andthenpressesjagainst and withlIO draws catch 31 from the pathof arm 30.'As

this, takes place said'arm rotates, ashere inbefore explained, until itstrikesaigainst" and is arrested by said plug. In such preg ressitimparts twelve pulsations of current over the line andfacorrespondingnumber] through the local circuit 23 if such circuits T are employed.gized twelve'times and impart a corresp'ond- The magnets are theneneringnumber of vibrationsto the armature-"1 carrying levers,"which in'turn,through the medium of springact'uated pawls 17, rotate all of thedisks'exoept that of the calling instrument, held inactive by meanshereinafter described a distance of six steps, equal to twelve steps ofthe ratchet-wheels. As a result the tooth 8 or the vibratory'contact of1 the called instrument engages the cam-notch 1 6 of the disk of saidinstrument and conductor 4, thereby throwing the circuit through thecorresponding phone, asindicated clearly in Fig.2, the remaininginstruments (except the calling instrument) being shunted out ofcircuit, because the cam-notches of their disks occur opposite theirrespective phone numbers and not opposite the characters corre spondingto the called phone, the result being that the teeth 8 engage theperipheries of their respective disks and the contacts the conductors 5,interposed between their respective phones and the source of electricenergy.

The specific means shown for sending the required pulsations over theline through the action of the rotating arm 30 is a disk 35, driven tomake one complete revolution while arm 30 is passing from one characterto another on the switchboard, said disk being provided with a hub 36,in constant engagement with a brush or conductor 37, located in circuit26, and with a pair of diametrically opposite contact-lugs 38, each ofwhich in one re volution of the disks makes and breaks the circuitthrough the brush or conductor 39, the intermediate mechanism betweensaid shaft or driven arm 30 being a large friction-wheel upon said shaftand a small friction-wheel 41 upon the shaft of disk 35 and engagingfriction-whee140, as shown in Fig. 2. It is to be understood, however,that I do not restrict myself to any particular means for transmittingmotion from shaft 29 to the shaft 'of contact-disk 35, nor, in fact, toany special means under the control of central for sending the desirednumber of current pulsations over the line.

Referring now to means whereby the calling subscriber is enabled to holdhis instrument inactive while central is synchronously throwing thecalled subscriber in and the remaining subscribers out of circuit, 42desiignates a push-rod fitting slidingly in frame 42 (which frame, asshown, pivotally carries the vibratory contact 7 and the conductors 4and 5) and embodying an angular portion 43, which prevents rotatablemovement without interfering with longitudinal movement in the frame.Said push-rod is provided with a depending angle-arm 44, adapted to beinterposed between the magnet and its armature-carrying lever, anexpansive spring 45, however, serving to hold the rod with saidangle-arm normally forward of and therefore out of the path of saidlever. Said pushrod has its front end opposite the push-button 46fitting in the door 47 of easing 6, so that as the push-button ispushedinward it shall strike and move the push-rod in the same direction, andtherefore dispose the angle-arm 44 below the armature-carryin g lever,and thus prevent the latter responding to the energization of themagnet. As the pressure is removed spring 47, spirally encircling therod and bearing at its opposite ends against the door and the collar 48of the push-button, restores the latter to its original position andpermits spring to 'readvance the push-rod and move its angle-arm frombelow said lever.

Should the instrument of any particular subscriber be out of circuitwith the remaining instruments, he becomes aware of that fact by aglance at disk 9 through the transparent face-plate 49 of the door andrestores his instrument to its proper positionviz., with the tooth 8engaging the home notch of the disk (see Fig. 3)by mechanicallyimparting the required number of movements to the armature-carryinglever. The means employed for this purpose consist of a vertical rod 50,mounted slidingly in frame 12 (see Fig. 6) and provided with ahorizontal foot 51 at its lower end, overhanging the armature end ofsaid lever, a spring 52 surrounding the rod and bearing at its oppositeends against the frame and the pin 53 or an equivalent device on the rodserving to hold the latter normally elevated, so that its foot shall notinterfere with the free operation of said lever. The upper end of therod projects through the top of the casing by preference and carries apush-bottom 54 thereon,by which it may be operated, and'within thecasing it is provided with a collar 55, for a purposewhich hereinafterappears. By alternately depressing and releasing the push-button 54 itis obvious that the armature-carrying lever will be operated and willrotate the disk, the movement of the push-rod being continued until thetooth 8 of the vibratory contact enters the home or 0 notch, when theinstrument is again in condition to serve as a calling instrument or tooperate under pulsations of current sent out from the central office.

To prevent children or maliciously-inclined persons from throwing theinstrument out of circuit by mechanically operating the disk in themanner described or by preventing the disk from operating when it shouldrespond to impulses sent out over the line from the central office, Iprovide a locking mechanism constructed as follows:

56 designates a slide-bolt provided with slots 57, mounted on pins 58,projecting from the casing and serving as a guide and as a means forlimiting the movement of the bolt. At its upper end the bolt is providedWith the laterally-projecting arm 59 for sliding on the push-rodbeneathcollar 55, and at its lower end it is provided with an arm 60,arranged to operate between the front end of the pushrod 42 and thepush-button 46. ordinarily disposed as shown in Fig. 6that is, with itsarm 59 against the under side of collar and its arm 60 directly betweenpush-rod 42 and push-button 46, being held The bolt is in such positionand also automatically thrown thereto by a spring 61, interposed betweena lug 62 on the slide-bolt and acollar 63, mounted upon an adjusting-screw 64, carried by a lug 65, projecting from frame 12, saidadjusting-screw being employed as a means for tenimpulses ble, a plain Ino I as the conversation ,is ended the SOUS.

eager? interfered with. .To overcome the resistance 7 or said spring andunlock the belt, a key is necessary, it being preferred, of course, thatthe hey be of a peculiar'type. In the drawings, to-simplify the case asmuch as possikey 66 i'sbmployed, fitting in a keyhole 67 in the door andhaving itsfbit 68 adapted by pressure against lug 69 of the bolt toforce the lock downward and hold it in suchpo'sition against the actionof spring 61 as long as thelphone is in use. As soon a key is of coursewithdrawn and placed-ind position inaccessible to children orunauthorizedper- When. a subscriber desires .for any reason,

to throw his phone out of circuit-foriustanee, when he does notdesi'reto bedisturbe'd at" enumerated night-41c depresses 'push-buttonfii once,this depression moving hi's'disk onehalf stepbeyond the home notch andtherefore th rowing the vibratory contact into engagement with conductor5. i The current therefore obviously passes from contact 7through-donductor 5 instead of passing through the phone..

From the above description it will beiapparent. that I have produced anelectricswitch embodying the features of advantage,

-.invention,-and while I 'have described and illustratedthe preferredconstruction'it is to beu'nde rsto'odthat itis susceptible of Val'i?ons'changes without departingfrom its'spirit "Having thus'described theinvention, what I claimas new, and desire to secure by Letters andscope,

lulu an apparatusof the-character do scribed, a-main-line circuit, a.service',i n-' strum'ent therein-esuch'for instance as a tele-; phone,a movable contact to shunt said instrument in or out of said circuit, anauxiliary-circuit, means for sending electric impulses therethrough, anelect'romagnet in said auxiliary circuit, an armature-carrying lever-1;

' operated by said magnet and provided with! a pawl, ja ratchet-wheelengaged by said pawl, 1

and a disk movable with said ratchet-wheel and numbered to correspondwiththe number ofthe service instrumentor phone a in the circuit, andprovided with a home notch and n notch opposite the number-i dicativ-eof'th'e cbrrespondiug service"\i I phone,

' iary circuit, means for sending i it circuit respectively. i

strumeuhthe movable contact when engaged with of disengagedfrom-eitherof said notches holding-the service instrument in or out of2. In an apparatus. of the character described, a main-line circuit, aservice instrument therein-such for instance as a telea movable contactto shunt said instrnment in or out of said circuit, an auxilelectricimpulses therethrough, an electromagnetin said auxiliary circuit, vanar; ature-carrying lever sent out from the central oiiice be I asdesirablein the statement of 3. in an apparatusof the character.-described, a main-line or instrument in or out'o'f cirrne'nt,"anauxiliary circuit, means for sendtromagnet' to be energized by eachimpulse,

"tact'to throw'the 'service? instrument ino'r out of circuit with themain line, means for holding said armature-carrying leverunrespousive-td the euergization of the magnet,

v ntuit mmns for mechanically. operating said lever andtherebyshuntingsaid fiservice instrument in or out of circuit.

phone, rag-movable 4 strumentin 'or out of circuit, an auxiliarycirtherethrough,'- an electromagne't in said auxcrated'by said magnetand, p'rovidedwith a a disk movable with said ratchetwheel. and

circuit, an'd'provided witha Home notch and a notchoppo'site then'umberindicative of the corresponding service instrument, the movablecontact when en-gagedwith-or disenigaged from either of said notchesholdingthe 9 service instrument in orout of.circult respectively,authorized I cribed; a maimline circuitpa fservice iining in orout ofcircuitsaid serviceiiin'strumagnet to be energized byeach'impulse, anarmature-carrying lever, means operat said lever for causing saidmovable contact td throw the service instrument in or out of circuitwith the main line, means for hold-' ingsaidarmature-carrying leverunresponsive to the energization of D for mechanically operating saidlever and thereby shunting said service v instrument either of saidnotches holdrcnit, a service in-' strumentthereima movable contact forshrine: in g 1n or out of circuit said service instru-'- iliary circuit,an armature-carrying lever op- 1 p 105 pawl, a ratchetwheel engaged bysaid pawl, A

ment, an auxiliary circuit, m'eansfor sendingelectric--impulsesstherethrongh, an electroa edbythe magnet, "means.

and means for holding said iug electric impulses therethrough, an elecan armature carrying lever, means operated I by said lever forcausingsaid movable con; 1

4.111 an apparatus of the character 'deei scribed, a main line circuit,a service in-;

strument therein-such for instanceasa telecontact to'shuut said in-Qtoo.

- c'uit', meansfor sending electric impulses the service instrument orfphoue inthe' IIO s rume'nt therem,a movable contactforshh'nt Iand-means for preventing an unpersonfrom"movinjgsaid'movable a contactand shunting the service lllliBt-Ill but insulated from themovable-orvibratory or the other of said contacts-a rotarydisk'containing a character indicative of the number of said service'instrument, and'a notch opposite said character, a tooth attachedto butinsulated from the movable or vibratory contact, and when engaging thenotch, permitting the contact to'engage' the contact between which andthe source of electric energy 1s located, the fservice instrument, and.means for rotating said disk and thereby throwing said tooth out of thenotch and cans-' ing -the vibratory contact to engage the other contactand shunt the service instrument out of the inain-lineci'reuit.

7. In an apparatus ot'the character de-- scribed,- ama n-line circuit,acontact therein,

a service instrument interposed between the contactand the source ofelectric energy,

a second contact interposed between the in"- strument and the source ofelectric energy, a movable/or vibratory contact to engage one or 'theother of said contacts, a rotary diskcontaining a character indicativeof the nu mberof said service instrument, and a notch oppositesaidcharacter, a tooth'attached to contact, and" when engagingthe notch,permitting the contact to engage the contact between which and thesource of electric energy islocated the service instrume lt, alever forintermittently rotatingsaid disk,and thereby throwing thevibratory'contact in engage ment strnment and the source of electricenergy, a.

' with one of said contacts or the other, and mechanically-operatedmeans for oscillating said lever, substantially asldescribed.

-8. In an apparatus of the character described, amain line circuit, acontact therein,

a service instrument interposed between the contact and the source ofelectric energy,

a second contact interposed between the inmovable or vibratory contactto engage one or the other of said contacts, a rotary disk containing acharacter indicative of the number of said service instrument, and anotch oppositesaid character, atooth attached-to but insulated hour themovable or vibratorycontact, and when engaging the notch, permitting thecontact to engage the contact between which and the source of electricenergy is located the service instrument, a lever for intermittentlyrotating said disk, and thereby throwing the vibratory contact inengagement with cue-or the other of said contacts, and a puslrhntton foroperating sai 4 lever, substantially as described.

9. In an apparatus of the character described, a main-line'circuit,acontact therein, a service instrument interposedbetween the contact andthe source of electric energy, a second contact interposed between theinstrument and the source of electric energy, a movable or vibratorycontact to engage one or the other of said contacts, a; rotary diskcontaining acharacter indicative of the number of said serviceinstrument, and a notch opposite. said character, a tooth attached tobut insulated from the-movable or vibratory contact, and when engagingthe notcl1,'permitting the contact to engage the contact betweenwhichand the source of electric energy is located-the serviceinstrument, a lever for intermittently rotating said disk, and therebythrowing the vibratory contact in engagewent with one or'the other ofsaid contacts,

and mechanically-operated devices for preventing the-operation ofsaidlever, substantially as described.

10.-In an apparatusof the character described, a main-line circuit, acontact therein,

- a service instrument interposed between the contact and the source ofelectric energy,

a second contact interposed between the instrumeiit and the source ofelectric energy, a

movable'or vibratory contact to engage one or the other of saidcontacts, a rotary disk containing aeharacter indicative of the numberof said service instrument, and a notch opposite said character, atoothlattached to but insulated from the movable or vibratory contact,and when engaging the notch, permitting the contact to engage thecontact befor intermittently rotating said disk, and thereby throwingthe vibratory contact in engagement with one or the other of saidcontacts, mechanically-operated devicesfor preventing the operation ofsaid lever,and means forantomatically preventing the last-named devicefrom beingfactuated by an unauthorized person to interfere with the freeoperationof said lever, substantially as described.

11. In an apparatus of the character described, a main-line circuit, acontact therein, a service instrument interposed between thecontact andthe source of electric energy, a second contact interposed between theinstrument and the source of electric energy, a movableor vibratorycontact to engage one or the other of, said contacts, a rotary diskcontaining a character indicative of the nu mber of the serviceinstrument, and a notch opposite said character, a'tooth attached to butinsulated from the movable or vibratory contact, and when engaging thenotch, pertween which and the source of electric energy is located theservice instrument, a lever mitt-ing the contact to engage thecontaet'between which and the sourceof electric energy is located theservice instrument, a lever opposite'saidcharactenathoth attached to butinsulated 'from the movable'or vibratory 1 last-named meansfrolnfinterfering with the substantially as described.

en l. n m mheneq a ing; the; l um en fi 5 5 ably engage one of saidholes and thus arrest scribed," in ireu te p urality of f, serviceinstruments'therein,mo vable c0nstrurnent therein, amenable contactto'shnnt 4 p reservventing the operation of said lever, means forautomatically preventing the last-named devices from being actuated byan unauthorized person, to interfere with the free operation of saidlever, and a key for withdrawing said antomatic devices to inoperativeposition; substantially as described. y 12. In an'apparatus of thecharacter de: scribed, a main-line circuit, a contact therein, aservice'instrmnent interposed between the contact and'the source ofelectric energy, a second contact'interpos'ed' between the instrumentand. the-source of electric energy, a; movable or vibratory contact toengage one or the other of said contacts, a rotary disk containing acharacter indicative of the- 1mm: ber of said service instrument,ands-notch operation of the lever and for preventing-the means foroperating the lever from o p'era'ting the same; and means to withdrawsaid automatic'device to. aminoperative position,

-.,13. In an apparatus; g the character described, a mainfli'neclrciiit,a fsctvi'ce insaid"servi ceinstrument iu'or out. of cir-;

a u 0' u o cult, anauxlhary circuit, an. electromagnet therein, anarmature for the magnet, instru-.. mentalities interposedbetween-the'armathre and the movable ccntact whereby the latter iscaused to shunt the service instrument. in or out of the main-linecircuit, and means for sending the required number of electricimpulsesover theline, the same comprising a rotating arrri a movable catch toautomat ically arrest said'rotating arm at thecom-g plction ofeachrevolution.theroL-a.plate provided with holes arranged in a circularse- .service'instruments, and a pin toremev-v said arm before it hascompleted a revolution;

l4.- 1 In an apparatus" of the character detacts to shunt said serviceinstruments in: or outof circuitjwith the main line, rotary disksforsaid:.zinstruments, provided with characters indicative of the numberof said: fservice" instruments,each disk being pro vided withra home 7notch, and with ajnotch oppositethe character indicativeoi the numablecontactsand adaptedto engage alternately, the notches and theperipheries of parting intermittent actionto said disks, an

and means for sendingthe required number of electric impulsestherethroug-h for causing particular diskwiththe tooth of its respectivemovable contact.

15; In an apparatus of the character described, a main-line circuit,aplurality of t service instruments therein, movable con.- .tacts toshunt saidservicefinstrumcnts in disks for said instruments, provided.with vided with a opposite the insulated from-and, carried bysaidmovable circuit, an electromagnet therein, means forsending the requirednumber of electric irm tionof the character-notchof alparticular dis-l:

tact, andmeans; for mechanically operating the diskof a particularinstrument.

.-.16. Inan apparatus of the-character described,za main-linecircuit,"a1 plurality of tactsto shnntsaidservicc'instruments in oppositethe'character indicativezof thenum' her of its respective serviceinstrument, teeth contacts and adapted v thenotches and the peripheriesof said disks,

"sending the required numbercf electric impulses therethrough and forcausingthe regis disk with the toothof-its respective movable saiddisks, an armature-carrying lever for iur' characters indicative of thenumber of said service instruments, each. disk being pro-,-

home notch, and with a notch character indicative ofthe numitsre'spectiveservdce instrument, teeth with the 'tooth'of its respectivemovable con-- .service instruments therein; movable conteeth insulatedremand carried by said movauxiliary circuit, an elcctromagnet therein,

i v '75- the registration of the character-notch of a or out of circuitwith themain line,--rotary E.

contacts and adapted to engage" alternately, the notches and theperipheriesof said disks, an armature carryihglever,,for.impartingin-'-J termittent faction tosaid disks,an auxiliarypulses therethro'ugh for-causing theregistrm hr out of circuit with themain line, rotary disksfor. said instruments, -provided fwithcharactersindicativc of the number or said 4 service instrnrnentggeach-disk-being pro-' vided with a home notch, and witha notch.

insulated from and-carried by said movable I to alternately engage 15.'an armature-carrying lever for imparting interrnittent action to saiddisks, an auxiliary 'circuit,an electromagnet therein, means for p 1292trationlof the'characteg-notchcfa particular contact, means formechanically operating of its magnet, substantially as described.

[In testimony whereof lafiixmy signature in the presence oftwowitnesses;

., Witnesses: I Romans,

ber of its respectivej,serviceftinstrument,

t G. Y. Tsdnrnr said disk of' the particular instrument, and means-forholding inactive the disk-of a par-1 ticuiar instrument, against theenergizationi a Bonner c. MOORE.

